Federal investigators delivered subpoenas or paid visits to several House and Senate Republican offices in the Pennsylvania Capitol on Tuesday and Wednesday, according to multiple sources.

At least some of the individuals receiving subpoenas were told they were not targets of an investigation, according to at least six sources reached by PennLive, but that they may have information of interest to the FBI. All of the sources had been briefed on the investigative moves in some way, but demanded anonymity in order to discuss them.

The information being requested centered around U.S. Rep. Scott Perry, R-Pa., and the effort to seek alternate electors as part of former President Donald Trump’s efforts to remain in office after the 2020 election, several sources said. The Washington Post on Wednesday, citing a source familiar with the probe, also reported that Mr. Perry’s cellphone was seized Tuesday as part of the Justice Department’s criminal investigation into the use of fake electors to try to overturn President Biden’s victory. The Post’s source also spoke on the condition of anonymity.

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The Trump slate included a number of well-known GOP luminaries, including former congressman Lou Barletta, Allegheny County Republican Committee Chairman Sam DeMarco III, Mr. Comfort, the current vice-chair of the Pennsylvania Republican State Committee, and Andy Reilly, one of Pennsylvania’s members on the Republican National Committee.

Pennsylvania Attorney General Josh Shapiro said in January that his investigators had looked over the Republican elector slate and felt that while the action was “intentionally misleading and purposefully damaging to our democracy,” they did not believe it met the legal standards for criminal prosecution under state law.

No sitting Pennsylvania legislators were a part of the pro-Trump elector slate, though The New York Times reported last month that at least some in Mr. Trump’s campaign leadership considered Doug Mastriano, the Republican candidate for governor, as the “point person” to help organize electors in Pennsylvania.